Headphone hinge



FIG. 1 is a front, top, and left side perspective view of a headphone hinge in an open condition showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a front, top, and left side perspective view of a headphone hinge in a closed condition showing my new design;

FIG. 9 is a top view thereof;

FIG. 10 is a bottom view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a front view thereof;

FIG. 13 is a left side view thereof; and,

FIG. 14 is a right side view thereof.

The broken lines shown in FIGS. 4 and 9 illustrate portions of the headphone hinge that form no part of the claimed design. 

CLAIM The ornamental design for a headphone hinge, as shown and described. 